Level island platform that is high-level on one side only?

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Level island platform that is high-level on one side only?

Postby BostonUrbEx » Mon Aug 10, 2015 2:43 pm

Anyone have examples of a level island platform (completely flat across, no ramps, no stairs) which is a high platform on one side and a low level on the other? This is obviously achieved by the track beds themselves being at differing elevations.

Any examples of this in the world?
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Re: Level island platform that is high-level on one side onl

Postby The EGE » Mon Aug 10, 2015 7:43 pm

North Station (MBTA subway) - southbound Green and Orange Lines
Camden Station - southbound Baltimore Light Rail and terminating Camden Line

I believe there are some British examples as well.

Kenmore (MBTA subway) was designed for the center tracks to be dropped for heavy rail conversion, but this was never done.
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Re: Level island platform that is high-level on one side onl

Postby ExCon90 » Tue Aug 11, 2015 4:42 pm

In Stockholm, the Alvik station on the Tunnelbanan is a connection point with a light-rail line (formerly the 12, later something else, today maybe 12 again, or 112) to Nockeby. The station (above ground) has 4 tracks with 2 island platforms; the T-banan uses the outside, and the light rail terminates on the inner tracks, providing cross-platform transfer with the T-banan. The platforms are entirely flat, with the light-rail tracks in the center at a higher level than the outside T-banan tracks, which have floor-level boarding (sort of the opposite of what was planned for Kenmore). An unusual wrinkle is that the T-banan is left-hand running, and so was the light rail until Sweden changed over from left- to right-hand road traffic in September 1967. At that time they put in a diamond crossing so that now the light rail leaves Alvik station running on the left and immediately crosses itself on the diamond to become right-hand running; this was done to avoid confusing motorists, who all had to be coached to look left instead of right, as they had done all their lives until then, at intersections. They felt that a trolley line running left-handed in the median or alongside of a right-handed roadway would be asking for problems.

I have an idea there may be some examples in Brussels, but I can't remember for sure. Both Brussels and Stuttgart have stations where part of a platform is low and the rest high, with steps to climb from one to the other and trains (running on the same track) stopping at the appropriate part of the platform, but whether either city has a station meeting
the criteria I don't know.

In Vienna there's a station on the U-Bahn (I think Laengenfeldgasse), a 4-track station with 2 island platforms, where the U4 and U6 have a cross-platform transfer, the U4 being heavy rail and the U6 light rail. I can't remember which line is on the outside, but if it's the U6 it would be an exact example of the plan for Kenmore.
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Re: Level island platform that is high-level on one side onl

Postby The EGE » Tue Aug 11, 2015 7:10 pm

Many of the old BERy transfer stations in Boston also had cross-platform transfers between rapid transit and streetcars. Everett, Sullivan, Dudley, Fields Corner, and Ashmont for sure.
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Re: Level island platform that is high-level on one side onl

Postby BostonUrbEx » Wed Aug 12, 2015 7:05 am

Thanks for the examples, you two! I should have remembered some of those MBTA ones.

It seems all these examples involve a light rail transfer, though. Any examples for railroads? I'm specifically thinking of needing a clearance track for freights, with a preferred passenger platform for quicker boarding, but the flexibility of a second, low-level platform if necessary. I imagine a majority of situations would simply warrant a gauntlet track -- but I'm curious if anyone knows of any examples of this.
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Re: Level island platform that is high-level on one side onl

Postby ExCon90 » Wed Aug 12, 2015 3:29 pm

I don't know of anything like that; keeping the platform on one level would mean either raising the freight track or lowering the passenger track, and I can't imagine a railroad doing that if they could cope any other way.
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